We tested "psi probes" on gasses pressurized in small metal containers into which electrodes had been inserted. If the gasses were affected by the probes, then the atoms of the gasses might move in ways which were called "excited." This kind of set-up is standard and familiar science. The use of excitable gasses in measuring devices is well understood. For example, gasses are utilized in Geiger counters which measure radioactive waves. In this case, the gasses may be amyl acetate, ether or alcohol, etc. When the Geiger counter is in the presence of x-rays and gamma rays, those rays penetrate the tube containing the gas excite it. The electrode devices which within the tube measure the electron excitement of the gas. Thus, the only unconventional aspect of our experiments was that "mind-rays" or something like them were being used to excite the gasses. Cleve also suggested we move on to BIOLOGICALS. These first consisted of one-celled animals purchased from standard biological supply houses. Cleve also scraped up some biologicals from the bottoms of the urinals in his building which were seldom cleaned or sterilized. Then, with a sense of rather high drama and daring, we moved on to testing the psi probes with regard to two very important biologicals -- human blood and seminal fluids.